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Control of Breathing During MRI-Based Procedures

a technology of breathing control and mri, applied in the direction of respiratory masks, radiation therapy, sensors, etc., can solve the problem of no special benefit in reducing the number of scans performed, and achieve the effect of preventing leakag

Active Publication Date: 2017-05-18
ELEKTA AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about using the valve of an ABC device to treat tumours in a patient. The valve can be driven by an output from the MRI scanner, rather than relying on an inferred flow rate. This way, the MRI data can provide a direct measurement of the tumour position, increasing treatment accuracy. The technology can be used to improve both MRI scanning and radiotherapy techniques. The breath control device can be a face mask or a tube with a nasal clip to prevent leakage.

Problems solved by technology

Generally, the non-ionising nature of MRI scanning means that there is no especial benefit in reducing the number of scans performed.

Method used

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  • Control of Breathing During MRI-Based Procedures
  • Control of Breathing During MRI-Based Procedures
  • Control of Breathing During MRI-Based Procedures

Examples

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Embodiment Construction

[0020]FIGS. 1 and 2 show a system 2 according to embodiments of the present invention, comprising a radiotherapy apparatus 6 and a magnetic resonance imaging (MRI) apparatus 4. A patient 5 is present in FIG. 1 and shown in part, but is not present in FIG. 2.

[0021]The system includes a couch 10, for supporting the patient 5 in the apparatus. The couch 10 is movable along a horizontal, translation axis (labelled “I”), such that a patient resting on the couch is moved into the radiotherapy and MRI apparatus. In one embodiment, the couch 10 is rotatable around a central vertical axis of rotation, transverse to the translation axis, although this is not illustrated. The couch 10 may form a cantilever section that projects away from a support structure (not illustrated). In one embodiment, the couch 10 is moved along the translation axis relative to the support structure in order to form the cantilever section, i.e. the cantilever section increases in length as the couch is moved and the ...

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Abstract

The valve of an active breathing control (ABC) device can be driven by the output of the navigator channel of the MRI scanner, rather than by inference from a measured breath flow rate. Where the MRI scanner is integrated with a radiotherapy device, the MRI data can be used to trigger the enforced breath-hold by the ABC, and the radiotherapy delivered while the ABC valve is shut. If the MRI data pertains to the actual position of the tumour, then the ABC device will (in effect) hold the tumour at a precise and reproducible point for treatment.

Description

FIELD OF THE INVENTION[0001]The present invention relates to the control of breathing during medical procedures that include an MRI-based component.BACKGROUND ART[0002]MRI scanning processes are sensitive to movement of the patient's anatomy that is being scanned. It takes time to acquire a complete k-space data set (the Fourier data set from which an MRI image is computed), typically a minute or so, and any movement will result in different parts of the sampled k-space data set being obtained with the patient's anatomy in different positions. This inconsistency in the data set will create motion artefacts in the final image. The motion of the anatomy may be due to the respiratory and cardiac cycles of the patient.[0003]A similar problem arises during radiotherapy; respiration causes tumours or other lesions in the chest area to move in synchrony. This presents problems in targeting the radiation at the tumour, as the tumour's position at any one time is uncertain. To achieve the pr...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B5/055A61B5/00G01R33/48A61M16/20G01R33/567G01R33/565A61N5/10A61M16/06
CPCA61B5/055A61N5/1068A61B5/7292A61M16/06A61M2205/33G01R33/5676G01R33/56509G01R33/4812A61N2005/1055A61M16/202A61B5/113A61M16/00G01R33/28A61B5/4887A61M16/021A61B5/0515A61B5/0522A61N5/00A61N5/1048G01R33/56G01R33/567
Inventor BROWN, KEVIN
Owner ELEKTA AB
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